

.d7 {background: #7BA7AB;}
.d7:after { clear:both; display:table}
.d7 form {
  float: right;
  margin-right: 30px;
}
.d7 input {
  width: 250px;
  height: 42px;
  padding-left: 15px;
  border-radius: 42px;
  border: 2px solid #324b4e;
  background: #F9F0DA;
  outline: none;
  position: relative;
  transition: .3s linear;
}
.d7 input:focus {
  width: 300px;
}